Product Description
CMT 311.064.21 Dowel Drill - 1/4" x 30 x 70mm Right-Hand is a premium solid carbide boring bit engineered for high-speed panel processing, furniture production, and cabinet making. Built entirely from super micrograin carbide, this right-hand rotation dowel drill delivers clean, flat-bottom blind holes in hardwood, MDF, particle board, chipboard, veneered panels, and difficult composite materials. Its long-series 70mm overall length with a 30mm cutting height makes it well suited for deeper blind-hole boring where standard-length bits fall short - giving woodworking professionals a reliable tool for dowel joinery and panel assembly operations on multi-spindle boring machines and CNC routers alike.
Key Features
- Solid super micrograin carbide construction - the entire bit body is made from premium quality carbide, delivering exceptional wear resistance and the ability to withstand an almost infinite number of resharpenings, dramatically lowering long-term tooling cost.
- Curved, negatively ground spurs (2 spurs) - the unique tip geometry produces exceptionally clean bore walls with no rough edges or tearout, resulting in precise, ready-to-assemble dowel holes that require no secondary cleanup.
- Centre-point balanced tip - ensures accurate entry and consistent hole placement across repeated boring cycles, reducing registration error on multi-spindle and CNC equipment.
- Plunge edge extending to centre - reduces drilling resistance at entry, increasing production speed and allowing faster cycle times on boring centres and panel processing equipment.
- Cylindrical head larger than traditional tips - resists deflection and wear during prolonged use, maintaining dimensional accuracy over extended production runs.
- 2 cutting edges (Z2) with 2 spiral flutes - promotes efficient chip evacuation from the bore, keeping the cutting zone clear and preventing heat buildup in dense materials like MDF and particle board.
- 10x30mm parallel shank with driving flat - provides positive drive engagement and resists slipping in boring machine spindle chucks, ensuring consistent torque transfer and repeatable results.
- Right-hand (RH) rotation - compatible with standard right-hand spindle configurations found on the majority of industrial boring machines and CNC boring centres.
- Extreme sharpening rating - the solid carbide construction supports aggressive resharpenings, extending service life far beyond coated HSS alternatives and reducing downtime for tooling changes.
Why This Product
- Shops drilling high volumes of dowel holes in hardwood or dense composites like MDF and particle board benefit from the solid carbide body - it holds a sharp cutting edge far longer than conventional boring bits, meaning fewer tool changes and more consistent hole quality across a full production shift.
- The curved, negatively ground spur geometry solves a common problem in veneered panel and coated panel drilling: tearout and rough bore edges that compromise joint fit and surface appearance. Clean entry and exit are built into the tip design itself.
- With a 70mm overall length and a 30mm cutting height, this long-series bit reaches boring depths that standard-length dowel drills cannot achieve, making it the right choice for thicker panels or applications requiring deeper blind holes for dowel connections.
- The solid one-piece carbide construction eliminates the brazed-tip failure mode common in conventional boring bits - there is no junction point to crack or separate under the thermal and mechanical stresses of high-speed CNC boring operations.
Specifications
- Manufacturer Part Number: 311.064.21
- Brand: CMT Orange Tools
- Diameter: 1/4"
- Cutting Height: 30mm
- Total Length: 70mm
- Shank: 10x30mm
- Number of Spurs: 2
- Number of Cutting Edges: 2
- Number of Flutes: 2
- Rotation: Right-Hand (RH)
- Blade Material: HWM (Solid Super Micrograin Carbide)
- Sharpening: Extreme
Approved Applications
- Blind hole drilling for dowel connections
- Panel drilling in furniture manufacturing
- Cabinet making and case goods production
- High-speed multi-spindle boring operations
- CNC router and CNC boring centre applications
- Panel processing centre operations
- Boring in hardwood, softwood, chipboard, MDF, HDF, plywood, laminates, veneered panels, and coated panels
Frequently Asked Questions
What materials is this dowel drill designed to bore?
This solid carbide dowel drill is ideal for hardwood and difficult composites including particle boards, MDF, and veneered wood. It also performs well in chipboard, HDF, plywood, laminates, and coated panels - essentially the full range of materials encountered in furniture and cabinet production.
Can this bit be resharpened after it dulls?
Yes. Because the bit is constructed as a solid unit of carbide rather than a carbide-tipped steel body, it supports an almost infinite number of resharpenings. The sharpening rating for this tool is classified as Extreme, meaning significant material can be removed during each resharpening cycle while still maintaining a functional tool geometry.
Is this bit compatible with CNC boring centres and multi-spindle boring machines?
Yes. The 10x30mm parallel shank with driving flat is designed for use in boring machine spindles and adapters found on multi-spindle CNC boring machines, CNC boring centres, and panel processing centres. The right-hand rotation matches the standard spindle direction used in the majority of these machines.
Why does the product data specify "Extreme" sharpening - does that affect how long it lasts between sharpenings?
The Extreme sharpening designation refers to the capability of the solid carbide construction to undergo more aggressive resharpenings than standard carbide-tipped or HSS boring bits. The plunge edge design - which runs all the way to the centre of the bit - also reduces drilling resistance, which contributes to longer intervals between sharpenings by reducing the thermal load on the cutting edges during high-speed boring operations.
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